Improvement in dental polishing-tools



UNITED. STATES PATENT Demon.

IMPROVEMENT IN DENTAL POLISHING-TOOLS.

Specification forming part of Letters Patent No. 169,753, dated November9, 1875; application filed July 9, 1875. r

CASE E.

To all whom it may concern:

Be it known that I, SAMUEL S'rooKToN WHITE, of the city and county ofPhiladelphia, in the State of Pennsylvania, have invented a new anduseful Improvement in Polishing-Tools, of-which the following is a specification:

My invention relates to that class of polishing instruments in which areciprocating movement is imparted to the tool. Its objects are tofurnish a direct-acting reciprocating polisher, which shall be simple inconstruction, efficient in operation, and readily adjustable to vary thelength of stroke of the polishingtool; to which ends my inventionconsists in imparting to the tool a lateral vibratory motion in additionto the ordinary reciprocating motion, thus producing an efiicientrubbing action.

The subject-matter claimed is hereinafter specifically designated.

In the accompanyingdrawings, Figure 1 represents a vertical longitudinalsection through my improved polisher; Fig. 2, a similar horizontalsection therethrough.

In order to give a wide range of movement to the instrument, I prefer todrive it from any suitable motor by means of a flexible shaft, A, ofwell-known construction, which drives a crank-shaft, 13, mounted inbearings in a suitable casing or hand-piece, U. The crank 1) drives apitman, D, the throw of which may be adjusted by means ofa series ofholes in the crank-wheel at different distances from the center, or byaslot and set-screw, or other well-known equivalent means. 'Alongitudinal slot, cl, is formed in the pitman, through which a pin, 0,passes, and on which pin the pitman rocks as it is reciprocated;consequently the outer end of the pitinan will be vibrated laterally aswell reciproca-ted longitudinally, thus imparting to the tool E,inserted in a socket in the pitman, or secured thereto in any well-knownway, a compound rubbing motion, which is ery efiicient.

The range of motion of the polisher can be varied by adjusting thecrank-pin, and by moving the fulcrum-pin c backward or forward in thecasing, which can be done by mounting it in a sliding sleeve actuated bya screw; or a simple slide will answer.

In a polishing-tool, the combination, substantially as hereinbet'ore setforth, of the easing or hand-piece, the crank-shaft, thelongitudinally-slotted pitman or tool-holder, and the pin on which thepitman slides and rocks, whereby a compound longitudinal and lateralreciprocation is imparted to the tool.

In testimony whereof I have hereunto subscribed my name.

SAMUEL S. WHITE. Witnesses:

J. A. B. WILLIAMS, I FRANK L. HISE.

